(北京有色金屬研究總院, 北京 100088)
摘 要: 通過對理論計算、腐蝕稱重、碳含量測定等方法的比較,研究了SiCP/Al復(fù)合材料孔隙度的測定方法。結(jié)果表明，采用理論計算法來表征復(fù)合材料的孔隙度很不準(zhǔn)確，腐蝕稱重法雖然精確但比較繁瑣，碳含量測定存在較大的誤差。提出了一種新的方法----車屑法, 并用此方法研究了復(fù)合材料攪拌時間和孔隙度的關(guān)系，表明孔隙度隨攪拌時間的上升而增加。
關(guān)鍵字: SiCP/Al復(fù)合材料 孔隙度 密度
（General Research Institute for Nonferrous Metals, Beijing 100088）
Abstract:The porosity of SiCP/Al MMCs was quantitatively investigated by means of theoretic calculation, chemical dissolution and carbon content measuring methods. It was found that theoretic calculation method will bring errors in some cases, chemical dissolution method is the most accurate but overelaborate, carbon content measuring method also brings about big errors; thus the cuttings method, whose essential lies in fact of that the specimen was cut into small cuttings of porous-free and then measured its density after degreasing and drying, was established and used to study the relationship of porosity with stirring time in stirring casting process. The results indicate that the porosity increases with the increase of stirring time, and the cuttings method can be used to measure the porosity of SiCP/Al MMCs in stead the traditional methods.
Key words: SiCP/Al MMCs porosity density
